after installing about 2 hours ago, I can say that in principle this is a nice plugin - in fact one that should have been part of the base product for a long while. I always thought that writing
and tags in my javadoc is somewhat out-of-time.

However, at the end of my testing period I tried to insert a paragraph, at first using the provided Button. That inserted 2 empty lines, but no real paragraph. I then went ahead and edded the paraph by hand directly in the Javadoc, and bam!, the eclipse process was blocked in an endless loop, presumably in JDocEditor's HTML parsing code.